EP2102055B1 - Variable trim boat - Google Patents

Variable trim boat Download PDF

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Publication number
EP2102055B1
EP2102055B1 EP07859510A EP07859510A EP2102055B1 EP 2102055 B1 EP2102055 B1 EP 2102055B1 EP 07859510 A EP07859510 A EP 07859510A EP 07859510 A EP07859510 A EP 07859510A EP 2102055 B1 EP2102055 B1 EP 2102055B1
Authority
EP
European Patent Office
Prior art keywords
boat
hollow body
trim
water
flaps
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP07859510A
Other languages
German (de)
English (en)
French (fr)
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EP2102055A2 (en
Inventor
Enrico Curatolo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Know How Service Srl
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Know How Service Srl
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Publication date
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Publication of EP2102055A2 publication Critical patent/EP2102055A2/en
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Publication of EP2102055B1 publication Critical patent/EP2102055B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B43/00—Improving safety of vessels, e.g. damage control, not otherwise provided for
    • B63B43/02—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking
    • B63B43/10—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving buoyancy
    • B63B43/12—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving buoyancy using inboard air containers or inboard floating members

Definitions

  • the present invention relates to a variable trim boat.
  • Figure 1 shows a boat, designated with the reference numeral 100, in the ideal static configuration, wherein the longitudinal axis of the boat is in horizontal position; figure 2 shows the same boat in the ideal dynamic configuration, wherein the longitudinal axis of the boat is slightly leaning astern.
  • figure 3 shows a boat 100 in which the longitudinal axis is excessively leaning astern
  • figure 4 shows a boat 100 in which the longitudinal axis is leaning towards the bow.
  • the defects described can appear when the boat is moving, causing a worsening of the hydrodynamic performances of the hull and an increase of the fuel consumption, as well as when the boat is still, causing a reduction of the stability of the hull and of the comfort of the passengers.
  • the trim variation during navigation is achievable principally by operating in order to adjust the verticality of the drive shank, with the following rake of the propeller; it is likewise possible to vary the angle of attack of particular adjustable fins and to move the inner loads.
  • the international patent application WO 2004/067376 illustrates a method and an apparatus to improve the performances of the boats, which requires the use of a hull equipped with a plurality of fins, whose rake is adjustable according to a predetermined angle.
  • the variation of the angle of attack of these fins allows, in particular situations, to increase the speed of the vessel and to reduce the fuel consumption, modifying the hydrodynamic features of the hull.
  • the aim of the present invention is to overcome the cited drawbacks by devising a boat which has adequately variable trim both in static and in dynamic configuration.
  • a further aim of the present invention is to allow to realize a variation of the waterline in static configuration.
  • Another aim of the present invention is to provide a device applicable to existing boats in order to improve the static and dynamic trim of the same boats.
  • a further aim of the present invention is to provide a device to improve the trim of the boats of simple, constructive and functional conception, equipped with a certainly reliable functioning, of versatile use, as well as of relatively economical costs.
  • variable trim boat according to claim 1, and claim 1:2.
  • the boat is equipped with lateral hollow bodies, which serve both as reserves of buoyancy and as tanks that can be filled with seawater, to increase the stability of the boat and to improve its trim.
  • fig. 1 illustrates a side view of a boat in ideal static trim
  • fig. 2 illustrates a side view of a boat in ideal dynamic trim
  • fig. 3 illustrates a side view of a boat in which the centre of mass is excessively astern
  • fig. 4 illustrates a side view of a boat in which the centre of mass is excessively forward
  • fig. 5 illustrates a side view of a variable trim boat according to the claimed invention
  • fig. 6 illustrates an axonometric view of the box-shaped flaps arranged on the boat
  • fig. 7 illustrates a plan view of a detail of the claimed variable trim boat
  • fig. 8 illustrates an axonometric view of the claimed variable trim boat
  • fig. 9 and 10 illustrate two axonometric views of a different embodiment of the box-shaped flaps, in different operational situations
  • fig. 11 illustrates an axonometric view of a further embodiment of the box-shaped flaps
  • fig. 12 illustrates a schematic axonometric view of a boat equipped with box-shaped flaps, according to a different embodiment
  • fig. 13 illustrates a schematic axonometric view of a boat equipped with box-shaped flaps, according to a further embodiment
  • fig. 14 illustrates a side view of a canoe equipped with the box-shaped flaps according to the invention
  • fig. 15 illustrates an axonometric view of a different embodiment of the box-shaped flaps.
  • the boat 100 refers to the claimed variable trim boat.
  • the boat 100 comprises two or more box-shaped hollow bodies 1, preferably pyramidal, which work as volumetric flaps.
  • the volumetric flaps 1 are symmetrically arranged on the sides of the boat along the longitudinal axis.
  • the volumetric flaps 1 basically stretch from a hull central position until the stern area.
  • the peculiarity of the said box-shaped flaps 1, as will be better explained below, is that they are kept empty during the navigation, whereas they can be kept empty or adequately filled up with seawater when the boat is still, thus varying the underbody of the boat owing to its different dislocation.
  • the boat 100 preferably built in fibreglass-reinforced plastic, bears moulded the volumetric flaps 1, which create in this way a continuity with the hull, being part of it.
  • the volumetric flaps 1 consist of respective no-leakage chamber box structures (see fig. 6 ), insulated from the boat, and are provided with one or more recloseable openings 2 on the back side. The said recloseable openings 2 allow, upon conductor's control, the inlet of the seawater, and also the containment and the outlet of the same seawater.
  • the particular pyramid profile of the volumetric flaps 1, with rounded lines, is projected to improve the hydrodynamics, trying to eliminate as much turbulences as possible, facilitating in certain cases also the surfing, advantageously for the fuel consumptions, for the speed increase and the improvement of the stability in veering and/or in rough sea.
  • Some possible ribs 3 are provided for, individual or multiple, which work as anti-leeway stabilizers.
  • the pyramid flaps 1 can be structured in personalised way and according to the lines of the vessel.
  • a small fishing boat is represented, which is a fishing boat suitable for the integration with the volumetric flaps 1 to limit the swaying either during the sailing or in still state and to enhance the speed reducing the consumptions.
  • variable trim boat according to the invention.
  • the volumetric flaps 1 In stationary phase, it is possible to keep the volumetric flaps 1 empty or, alternatively, to partially or totally fill the said flaps 1 with seawater.
  • the underbody In the first case, the underbody will be less extended due to the engaging to float of the volumetric flaps 1, which serve as reserve of buoyancy, thus keeping the boat more hauled astern. In this case, an improvement in the trim can be obtained against rolling; this condition is anyhow comparable with that of many boats with a body with similar volumetry.
  • the flaps 1 filled up with water the maximum advantages can be obtained stability-wise. In this case a considerable increase of the underbody occurs, for the following stern heaviness of the boat. It has been highlighted, in fact, an extraordinarily higher stability, compared to that of the case before.
  • the volumetric flaps 1 give a new type of trim to the boat according to the innovative concept of hydro-variable trim. The filling and emptying procedure of the flaps 1 takes place according to the criteria and the modes explained below.
  • the boat can have its flaps 1 empty or already filled.
  • the volumetric flaps 1 will be lightweight and will pursue their usual task to improve the dynamic trim.
  • the acceleration phase will have to be started leaving the back outlet valves open, thus allowing the normal suction deriving from the depression that the seawater exerts assisted by the fall effect for the natural lifting of the hull from the static to the dynamic situation and to the inertial effect of the water mass in the acceleration phase.
  • Suitable dedicated handles 5 for the opening and closing of the valves are also adequately provided and arranged laterally behind the conductor's seat (see fig. 7 ), in an easily reachable position.
  • the said handles 5 can be arranged directly on the driving console, connected through a normal sliding cable.
  • the variation of water inlet inside the volumetric flaps 1 can also be handled through a valve, favouring the outlet of the air contained.
  • the dynamic trim variation described implies, in static or dynamic condition, a marked improvement of stability and trim.
  • FIG. 9 and 10 an internal inflatable hose is represented, which, through a compressor activated from inside the boat, can be inflated and deflated assuming the shape of the flap, which, in this case, will have more rounded lines on the outside, as can be inferred from the figures.
  • the pressure of the inflatable hose it is easy to determine the level of water filling in the flaps.
  • Fig. 11 illustrates a further embodiment of the invention, wherein the volumetric flaps 1 are installed, later or as optional, in already existing boats.
  • This solution is advantageous to apply specific flaps built on purpose for any type of manufactured boat, providing the described advantages and in case eliminating trimming defects.
  • Fig. 12 illustrates another embodiment of the invention, wherein the volumetric flaps 1 are installed inside the boat, in opposite lateral positions.
  • This version even though it limits the described effectiveness, has anyway considerable advantages, in fact it maintains unvaried the aesthetic of particular hulls and it is easy to personalize by the manufacturer.
  • Fig. 13 illustrates a further embodiment of the invention, which consists of a hybrid solution wherein the volumetric flaps 1 are partly internal and partly external with respect to the lines of the hull.
  • Fig. 14 illustrates the possibility to apply the flaps 1, as reserves of buoyancy, to the hull of boats of the kind of canoes, improving the stability thereof and favouring the insertion of the canoeist on board from the sea, operation generally very complicated.
  • the filling and emptying of the volumetric flaps 1 take place through manual operations; it is anyway also possible to provide for electric controls, in order to further favour the facility of use.
  • a much valuable solution can be represented by the electro-mechanical automatism of closure of the valves of the flaps 1 once the level of the water contained in each of the said flaps reaches the bottom; in this case, the input can be given by the level-detector instruments or more simply by a timer, which becomes operative once a determined speed of the boat is reached.
  • valve 4 in lifted position, to favour the filling inside the chambers of the volumetric flaps 1.
  • the valve 4 may usefully be equipped with an air-water separator filter, to avoid that during the filling, with the subsequent outlet of air, some water can penetrate inside the boat.
  • variable trim system is very useful for the boats arranged for fishing, but other categories may be interested in using this finding.
  • the sailboats, and in particular the catamarans could make use of the volumetric flaps 1 according to the present invention, not only as reserves of buoyancy but also as counterweight in sailing, thus compensating the lateral rake under effect of the wind against the sail; in this case, at one side the respective flap could be empty for a better thrust in surface, and at the other side it could be filled with water for the cited counterweight action.
  • an inlet valve 6 arranged on the front part of the volumetric flaps 1 (see fig. 15 ).
  • other sectors may valuably take advantage of this system, such as working boats, boats of the civil defence or of the fire brigades, lifeboats, yacht and other types of boats in which it would be possible to install the volumetric flaps 1.
  • variable trim boat reaches the aim to improve the stability of the boat and, at the same time, to allow the trim variations in dynamic and static configuration.
  • An advantage of the claimed invention is that it allows to realize a variation of the height of the waterline in static configuration.
  • a prerogative of the claimed invention is to provide a device, which can improve the trim of the existing boats, which show trim defects.
  • a further aim of the invention is to provide for a device of simple constructive functional conception, equipped with a certainly reliable functioning, versatile in use, and also relatively cheap in the costs.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Centrifugal Separators (AREA)
  • Tents Or Canopies (AREA)
  • Barrages (AREA)
  • Vibration Dampers (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
EP07859510A 2006-12-22 2007-12-21 Variable trim boat Active EP2102055B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000159A ITPI20060159A1 (it) 2006-12-22 2006-12-22 Imbarcazione ad assetto idro-variabile.
PCT/IB2007/055291 WO2008078306A2 (en) 2006-12-22 2007-12-21 Variable trim boat

Publications (2)

Publication Number Publication Date
EP2102055A2 EP2102055A2 (en) 2009-09-23
EP2102055B1 true EP2102055B1 (en) 2010-09-22

Family

ID=39454156

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07859510A Active EP2102055B1 (en) 2006-12-22 2007-12-21 Variable trim boat

Country Status (6)

Country Link
US (1) US20100024707A1 (it)
EP (1) EP2102055B1 (it)
AT (1) ATE482135T1 (it)
DE (1) DE602007009425D1 (it)
IT (1) ITPI20060159A1 (it)
WO (1) WO2008078306A2 (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012056552A (ja) * 2010-09-13 2012-03-22 Naoya Ogawa ハの字型の船尾双胴型流線形状および舵配置による船舶の減揺。
US8783200B1 (en) 2012-08-17 2014-07-22 Bennie Meyers Transformable hull vessel
US10501149B1 (en) * 2017-06-21 2019-12-10 Danny R. Hall Draft adjustable watercraft

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190926467A (en) * 1909-11-15 1910-01-27 George Burton Hunter Improvements in and relating to Ships.
US2725027A (en) * 1951-11-21 1955-11-29 H H & N A Hardin Company Multiple unit barge hull construction
US3512495A (en) * 1966-10-20 1970-05-19 Us Freight Co Selectively connectable boat and barge
US3841254A (en) * 1972-01-31 1974-10-15 G Dragonas Vessel with removable sections
DE3723817A1 (de) * 1987-07-18 1989-01-26 Rudolf Dr Wieser Unterseeboot
DE3924362A1 (de) * 1989-07-11 1991-01-17 Schwing Friedrich Schiffsrumpf, der einer langsam- und einer schnellfahrt angepasst ist
US6105527A (en) * 1996-12-18 2000-08-22 Light Wave Ltd. Boat activated wake enhancement method and system
US6234099B1 (en) * 1999-12-07 2001-05-22 Robert H. Jessen Methods and means to control boat wake
US7191724B2 (en) * 2002-11-12 2007-03-20 Lockheed Martin Corporation Method and system for mission module swapping in a vessel
US6684807B1 (en) 2003-01-30 2004-02-03 Joseph Alan Smith Smith Moses hydro lift flaps
US7178474B2 (en) * 2004-06-24 2007-02-20 Daniel Warnes Ballast system for boats

Also Published As

Publication number Publication date
WO2008078306A2 (en) 2008-07-03
ATE482135T1 (de) 2010-10-15
DE602007009425D1 (de) 2010-11-04
EP2102055A2 (en) 2009-09-23
WO2008078306B1 (en) 2008-10-09
ITPI20060159A1 (it) 2008-06-23
US20100024707A1 (en) 2010-02-04
WO2008078306A3 (en) 2008-08-21

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